Injector or aspirator



March 6, 1928.

INJECTOR OR ASPIRATOR Filed April 4, 1927 Patented Mar e, 1928.

' UNITED STATES HENRI vicron RIEHL, or VERSAILLES, FRANCE.

- 1,661,960. PATENT OFFICE.

INJECTOR on ASPIRATOR.

Application filed April 4, 1927, Serial 110.118 0384, and in France April 12, 1926.

The present invention relates to an apparatus which is adapted for the entraining of a fluid of a liquid or a gaseous nature by another fluid oi a liquid or a gaseous nature, 6 whereby the resulting mixture is enabled to accumulate in a closed vessel, in spite of the counter-pressure which is produced in said vessel, and to a lilnit which is greatly in excess of the limit afforded by the known 10 entraining apparatus.

The invention consists in the disposition of two walls which are parallel (or approximately so) and are close together, each wall being pierced with an orifice; the latter are not situated upon the same axis, but are so disposed that the projectionol either orifice on the opposite wall is tangent or approximately tangent to the periphery of the other orifice. so that if one orifice delivers a stream of fluid under pressure, this stream will break upon the opposite wall and will produce a powerful suction in the other orifice which is in communication with the fluid to be projected, this suction depending upon the speed of the stream of fluid under pressure. This suction will be produced irrespectively of the form of the said parallel walls, whether round, rectangular, elliptical,

curved, distorted, concave or convex and other outlines may be employed.

No breach of continuity or apertures can be allowed between the delivery and the suction orifices and the peripheral edges of the walls. If the said peripheral walls have a circular shape, and if the fluid mixture to be projected is not obliged to overcome a counter-pressure, the said edges may be left free; but if the mixture to be projected is to be delivered into a closedvessel in which it accumulates and is compressed, or if it is to overcome a certain pressure, the peripheral edges of the walls must be connected together so as to form a closed space. and

one or more orifices are formed on the said periphery whereby the said space will be connected with the said closed vessel.

When the stream of the entraining fluid is caused to break upon the said wall, it will be divided into a certain number of radiating secondary streams leaving between them various spaces which areat once occupied by the fluid drawn forward, and the said fluid is thus mechanically conveyed tothe periphery by the said radiating streams; the

56 latter will become separated as they proceed from the center, and will thus offer a greater space for the fluid which is drawn-forward, a. and when at a certain distance, this fluid will become rarefied to a degree which may attain the value of a vacuum accordingto the nature of thetluid employed. This vacuum, when combined with the mechanical action of the said radiating streams, willaid in increasing the force-oi the suction.

lVhen at the periphery, the fluids will strike againsttheperipheral portion which unites the two parallel walls; they will accumulatc at this point and will become compressed, thus forming a ring consisting of mixed fluids under pressure, and these lat tor will issue through orifices provided for the purpose with a force which will overcome a great resistance due to counter-pres sure. The region of the vacuum and the high pressure is determined by the proper choice of the length between the centre and the periphery, and also by the shape of the edges, by which the length of their periphery is obviouslydetermined. e

The inventionis shown byway of example in 'the appended diagrammatic drawings, wherein F ig. 1 is a vertical section, on a diameter, of the said apparatus in its theoretical form.

Fig. 2 is a plan view of thelower plate of the apparatus shown in Fig. 1.

Fig. 3 is a sectional and plan view of athe shape of the suction and the delivery orifices.

The said apparatus comprises two plates or walls 1 and 2 which are circular as shown in Fig. 2, or rectangular, square or spherical, which may be fitted into one another or may assume the form of a tube which is flattened and is then bent into a'U shape, or the said walls may in general be given all forms which are compatiblewith the use which is to be made of the same. i

At the centers of the lower and the upper plates are situated the respective orifices for the motive fluid 3 and for the suction 4 which are projected tangentially as shown in the plan view Fig. 2. The said orifices may. be disposed as shown in Fig. 3, i. e; in such manner that the issuing stream will impinge upon the portion 6 of the wall, the suction orifices having the eccentric position with reference to this point. The said orifices might be placed elsewhere than at'the center of the surfaceof the walls. For example, if the said walls have a rectangular shape, the

construction which is modified as concerns orifices may: be disposed at theen d of the rectangle, but herein theradiating' streams will not: have a uniform length, and the entraining will depend. upon this factor.

The mixed fluids are discharged through one or more orifices 7 which are formed: in the periphery of the said walls.

According to. the direction which is iven to the axis of the discharge orifice, which is penpendicularto: the plane otthe surface of theavalls in this" example but whiclrinay be inclined from the perpendicular, I mayprodhee an oblique streamewvhich causes the formatioln of curved secondal streams, thus producing a rotary 111th whirling motion which furthers. the preservation of the kinetic energyof the fluids. v

The apparatus will operate with all fluids whother ofa liquid or gaseous nature, and it wilh serve for. theentrainingof substances halving the character of dust or: syrup, as wellas fonthe production of a vacuum, or for compression, or for like purposes, and in fact the said apparatushas a wide field of applications i Iclaim,:- a 1. An apparatus for entraining and compressing gaseous or liquid fluids, which essentially comprises two walls with parallel surfaces, which are close together and are both pierced with an orifice, the projection of either orifice upon the opposite wall beorifices being providedion-the said periphery for the discharge of the mixed fluids.

3. An apparatus for entraining and compressing fluids, which comprises two walls with parallel surfaces, each wall being pierced with an orifice which is. tangent: to the projection otthe other; the walls of each orifice bein, inclined fromthe perpendicular to the plane of the walls; one of the said orifices serving for the suction andthe other for the motive fluid. the said wallsbein connected together at their periphery in such manner as toforin a closed space, one or more orifices being provided on the said periphery for the discharge of the mixed fluiclsw In testimony whereof I atlix my signature.

v HEN-RI VICTOR RIEHL. 

